package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * @ClassName DishServiceImpl
 * @Author YiXia
 * @Date 2024/3/14 15:23
 * @Version 1.0
 * @Description TODO
 **/
@Service
@Slf4j
public class DishServiceImpl implements DishService {


    //菜品表
    @Autowired
    private DishMapper dishMapper;

    //口味表
    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private SetmealMapper setmealMapper;


    /**
     * 新增菜品和对应的口味
     *
     * @param dishDTO
     */


    //事务一致性，操纵多个表实现可后悔的原子性机制。
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //向菜品表插入1条数据
        dishMapper.insert(dish);

        //获取insert语句生成的主键值
        Long dishId = dish.getId();


        //口味表插入多条数据
        //获取口味集合
        List<DishFlavor> flavors = dishDTO.getFlavors();
        //判断口味是否非空
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                //每个口味赋予上面的id值
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }


    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 菜品批量删除
     *
     * @param ids
     */
    //事务一致性注解
    @Transactional
    public void deleteBatch(List<Long> ids) {

        log.info("传入的ids参数={}", ids);


        //判断当前菜品是否能够删除---是否存在起售中的菜品？？
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //当前菜品处于起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断当前菜品是否能够删除---是否被套餐关联了？？
        //根据菜品id查询多个套餐id
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            //当前菜品被套餐关联了，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //普通删除不合理，下面优化项目批量删除才合理
//        //删除菜品表中的菜品数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除菜品关联的口味数据
//            dishFlavorMapper.deleteByDishId(id);
//        }
        //优化上面的删除步骤，开启批量删除菜品数据
        dishMapper.deleteByIds(ids);
        //批量删除上面的菜品对应的口味数据
        dishFlavorMapper.deleteByDishIds(ids);


    }

    /**
     * 根据id查询菜品和对应的口味数据
     *
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        //两张表分开查询，先菜品表，后口味表
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 根据id修改菜品基本信息和对应的口味信息
     *
     * @param dishDTO
     */

    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //修改菜品表基本信息
        dishMapper.update(dish);

        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }


    /**
     * 菜品起售停售
     *
     * @param status
     * @param id
     */
    @Transactional
    public void startOrStop(Integer status, Long id) {

        //构建Dish对象，调用更新方法实现更新操作
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);


        //停售的话套餐也要停售
        if(status==0){
            //寻找关联的套餐
            List<Long> ids=new ArrayList<>();
            ids.add(id);
            List<Long> setmealIDs=setmealDishMapper.getSetmealIdsByDishIds(ids);
            //便利套餐，选择停用
            if(setmealIDs!=null && setmealIDs.size()>0){
                for(Long sid:setmealIDs){
                    Setmeal setmeal = Setmeal.builder()
                            .id(sid)
                            .status(StatusConstant.DISABLE)
                            .build();
                    setmealMapper.update(setmeal);
                }
            }

        }
    }


//
//    /**
//     * 菜品起售停售
//     *
//     * @param status
//     * @param id
//     */
//    @Transactional
//    public void startOrStop(Integer status, Long id) {

//
//        if (status == StatusConstant.DISABLE) {
//            // 如果是停售操作，还需要将包含当前菜品的套餐也停售
//            List<Long> dishIds = new ArrayList<>();
//            dishIds.add(id);
//            // select setmeal_id from setmeal_dish where dish_id in (?,?,?)
//            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(dishIds);
//            if (setmealIds != null && setmealIds.size() > 0) {
//                for (Long setmealId : setmealIds) {
//                    Setmeal setmeal = Setmeal.builder()
//                            .id(setmealId)
//                            .status(StatusConstant.DISABLE)
//                            .build();
//                    setmealMapper.update(setmeal);
//                }
//            }
//        }
//    }

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


}
